<html>
<head>
<base href="https://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [X86] [AVX2] incorrect code generated for insert element"
href="https://llvm.org/bugs/show_bug.cgi?id=25320">25320</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[X86] [AVX2] incorrect code generated for insert element
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>koffieyahoo@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>This is a follow up to PR24935, but since the is related to insert element, I'm
opening a new issue.
The following:
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define void @__sample_test(<2 x i32>* %in, <8 x i32>* %out) {
body:
%0 = load <2 x i32>, <2 x i32>* %in, align 8
%1 = extractelement <2 x i32> %0, i64 0
%2 = insertelement <8 x i32> <i32 undef, i32 0, i32 0, i32 0, i32 0, i32 0,
i32 0, i32 0>, i32 %1, i64 0
store <8 x i32> %2, <8 x i32>* %out, align 32
ret void
}
Generates wrong code when AVX2 is enabled (a non-zero value occurs both in the
0th and in the 2nd position of the output vector due to the use of vpmovzxdq):
$llc test.ll -o - -mattr=+avx2
.text
.file "test.ll"
.globl __sample_test
.align 16, 0x90
.type __sample_test,@function
__sample_test: # @__sample_test
.cfi_startproc
# BB#0: # %body
vpmovzxdq (%rdi), %xmm0 # xmm0 = mem[0],zero,mem[1],zero
vmovdqa %xmm0, %xmm0
vmovdqa %ymm0, (%rsi)
vzeroupper
retq
.Lfunc_end0:
.size __sample_test, .Lfunc_end0-__sample_test
.cfi_endproc
.section ".note.GNU-stack","",@progbits</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>